摘要
目的:建立催化动力学光度法测定痕量I-的新方法.方法:在 0.10 mol/dm3 的柠檬酸介质中,痕量I-催化碘酸钾氧化吖啶橙褪色和生色,并初步探讨了反应机理.结果:I-浓度在 0～1.10 μg/25 cm3 范围内与吸光度差呈线性关系,检出限 0.10 ng/cm3, RSD 1.20%～3.80%,回收率 98.10%～101.60%.结论:该方法用于环境样品中I-的测定,多数常见离子无干扰,结果满意可靠.
Objective：To establish a new method for detecting trace iodine with catalyzing dynamics photometry. Methods：The method was based on the coloration and discoloration reaction between KIO3 and acridine orange with trace Iˉ catalyzed in 0. 10 mol/dm^3 citric acid medium. The reaction mechanism was discussed primarily. Results： A linear relationship holded between ΔA and the range of concentrations of Iˉ between 0 - 1.10 μg/25 cm^3. The detection limit was 0. 10 ng/cm^3, RSD ranged from 1.20% to 3. 80%, the rate of recovery was between 98. 10% - 101.60%. Conclusion：The proposed method has been applied to the detection of Iˉ in environmental samples with satisfactory and credible results,without the disturbance of the familiar ion.
出处
《中国卫生检验杂志》
CAS
2005年第11期1293-1294,共2页
Chinese Journal of Health Laboratory Technology
基金
苏州农业职业技术学院自然科学研究基金资助项目(ZR20040014)
关键词
吖啶橙
催化
双波长
痕量Iˉ
Acridine orange
Catalyst
Double wavelengh
Trace element Iˉ-
